Lateral restraint device



Sept. 17, 19.35. o. K. KJoLsETH 2,014,970

LATERAL REsTRANT DEVICE Sept. 17,' 1935.

o. K.l KJoLsl-:TH

LATERAL RESTRAINT DEVICE Filed June 28. 1934 2 Sheets-Sheet 2 HM @10WPatented Sept. 17, 1935 Y f' PATENT oFFieE LATERAL RESTRAINT DEVICE 01eK. Kjolseth, Erie, Pa., assignor to General Electric Company, acorporation of New York Application June 28, 1934, Serial No. 732,804

12 Claims.

My invention relates to lateral restraint devices for railway trucks forpermitting restrained lateral movement between a truck and the frame ofa railway vehicle supported thereby.

In railway vehicles, it is usual to support the vehicle frame on aplurality of trucks, and in order to lessen the pressure exerted by theanges of the wheels against the rails when the vehicle is passing overuneven tracks or around a curve, it is necessary to provide somearrangement for permitting lateral movement of the vehicle framerelative to the supporting trucks. It is also def sirable, particularlyin the case of guiding trucks, that the lateral movement of the vehicleframe relative to the truck shall not affect the distribution of weighton the truck.

An object of my invention is to provide an improved lateral restraintdevice which will resiliently center the vehicle frame on a truck, andwhich will not affect the distribution of weight on the truck.

Further objects and advantages of my invention will become apparent asthe following clescription proceeds and the features of novelty whichcharacterize my invention will be pointed out with particularity in theclaims annexed to and forming a part of this specication.

In the accompanying drawings, Fig. 1 is a plan view partially brokenaway of a truck having a lateral restraint device embodying myinvention; Fig. 2 is a sectionalview on line 2 2 of Fig. 1; Fig. 3 is asectional view on line 3 3 of Fig. 1; Fig. 4 is a sectional view on line4 4 of Fig; 1; Fig. 5 is a plan view of a truck including a modificationof the lateral restraint device embodying my invention; Fig. 6 is asectional view on line 6 6 of Fig. 5; and Fig. '7 is a sectional View online I 'I of Fig. 5.

Referring to the drawings, in Figs. 1 to 4 I have shown my invention inconnection with a twoaxle guiding truck having axles I provided withwheels 2 and journal boxes 3. The side frames 4 of the truck areprovided with pedestal jaws 5 at either end which retain the journalboxes 3 and the axles I in a, fixed horizontal position and allowvertical movement of the axles with respect to the truck frame. Weightis transmitted to the axles by parallel'equalizer bars 6 arranged oneither side of the vpedestal jaws and bearing on the journal boxes. Abolster 'I integral with the side frames 4 and journal box pedestals 5is supported on transverse springs 8 arranged between the equalizer barsB and connected thereto at either end by spring shackles 9. The bolstercarries a center plate I0 which is slidable laterally of the bolster inguides II formed in the bolster. Plates II am secured to the bolster andextending over the sides of the center plate prevent verticaldisplacement of the center plate. The weight A of the Vehicle frame I3is carried on the center 5 plate by a center pin I4.

In order to lessen the pressure exerted by the flanges of the wheelsagainst the rails when the vehicle is rounding a curve or passing overunf even track, it is necessary to provide some arl0 rangement forcentering the vehicle frame on the truck and for permitting lateralmovement of the frame with respect to the truck. In accordance with myinvention I provide a resilient centering device including transversesprings 24 retained 15 between vertically spaced plates 2I and 23 of thebolster on either side of the center plate for centering the vehicleframe I3 on the bolster. Each of the springs 24 is connected to thebolster at either end by rods 25, and is guided longitudinal- 20 ly ofthe bolster during deflection by a band 24a which surrounds the centralpart of the spring and ts within a recess or guide 29 formed in thelower plate 2 I, and an opening or guide 22 in the upper plate 23. Theplates 2I and 23 prevent ver- 25 tical displacement of the springsduring deection. In order to utilize the deflection of the springs 24 tocenter resiliently the center plate,

I provide a block or member I9 arranged in the recess 20 of the plate ZIand the opening 22 of 30 the plate 23 which bears at one end on theshackle 24a and is pivotally connected at the other end to a segmentalcam or rocker Il, as shown in Fig. 1. The rocker Il has teeth on itsinner surface which engage complementary teeth in the 35 oppositelyinclined surface I5 of a block attached to the center plate. Lateralmovement of the center plate with respect to the bolster causes theblock- I9 to be moved longitudinally of the bolster against the forceexerted by the transverse springs 24. The stop 24h on the bolster limitsthe lateral movement of the center plate. The plate 23 extends over thesegmental cams Il and prevents vertical displacementv of the cams 45'during lateral movement of the center plate. A plate 26 extends over thecenter plate and acts as a dust guard. Vertical displacement of theblocks I9 is prevented by the extension lila on the lower side of eachof the blocks I9 which i'lts un- 50 der the cooperating cam I 1. Theparts of the resilient centering mechanism are thus convenientlyarranged and guided in the bolster, and since the lateral movement ofthe center plate is in the plane of the bolster, the weight carried onthe truck center plate is unaffected by lateral movement of the centerplate.

In Figs. 5, 6, and '1, I have illustrated a modication of the lateralmotion device embodying my invention applied to a two-axle guidingtruck. The axles of the truck are indicated at 30, and the side framesof the truck carried by the wheels and axles are indicated at 3l. Abolster 32 is placed above the side frames 3l of the truck and suitablysupported thereon. A center plate 33 is carried on the bolster betweenguides 34 which allow lateral movement of the center plate with respectto the bolster. The vehicle frame is supported by a center pin fittinginto the semispherical seat 35 in the center plate.

The center plate 33 is resiliently centered on the bolster 32 by nestsof coil springs 45 arranged on opposite sides of the center plate andretained under compression within a spring pocket 49a between a stop 45and a sliding block or member 40. The spring pocket 40a is formedintegral with the bolster between plate 42 of the bolster, vertical sideplates 43 welded at their lower ends to the plate 42, a horizontal plate44 vertically spaced from plate ,42 and welded to the upper ends of sideplates 43, and the stop 45 is secured to the plates 42, 43, and 44 atthe end of the pocket 48a opposite the center plate. Each nest ofsprings comprises concentric coil springs 41 and 48, the respective endsof which t within a recess 49 in the stop 45 and a recess 50 in thesliding block 40, and an outer concentric coil spring 5l, the respectiveends of which are arranged in a recess 52 in the stop 45 and a recess 53in the sliding block 40. The block 40 is channel shaped having flanges54 slidably engaging the side plates 43 and horizontal plates 55 securedto the top and bottom of each ilange to provide an enclosure for one endof the springs.

In order to utilize the nests of springs 46 to center resiliently thecenter plate on the bolster, I provide rolls 38 at opposite sides of thecenter plate and arranged between the center plate and the block 40, andengaging oppositely inclined surfaces 31 on a plate 31a secured to thecenter plate and oppositely inclined surface 4I on the block 40. Therolls are maintained in the proper relative position during the lateralmovement of the center plate by connecting links 39 arranged above andbelow the rolls 38 and pivotally connected thereto. Flanges 38a on therolls project over the inclined surfaces 31 and 4I and prevent verticaldisplacement of the rolls. With this arrangement, lateral movement ofthe center plate with respect to the bolster causes the block 40 to bemoved longitudinally of the bolster against the force exerted by thesprings 45, and the force exerted by these springs tends to center thecenter plate resiliently on the bolster. The longitudinal movement ofthe block 40 is guided by the pocket 40a. The lateral movement of thecenter plate with respect to the bolster is in the plane of the bolster,and this movement does not elevate the Vehicle frame supported by thecenter plate and thereby produce uneven distribution of weight on thetrucks of the vehicle.

Although I have shown particular embodiments of my invention, I do notdesire to be limited to the constructions described, and I intend in theappended claims to cover all modifications which do not depart from thespirit and scope of my invention.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is:

1. A truck for a locomotive or car comprising a bolster having a guideextending longitudinally oi the truck, a center plate carried by saidbolster and movable laterally of the truck, a member movablelongitudinally in said guide, means including a spring on said bolsterfor resisting longitudinal movement of said member, and means includingsaid member for centering said center plate on said bolster.

2. A truck for a locomotive or car comprising a bolster having a guideextending longitudinally or the truck, a center plate carried by saidbolster and movable laterally of the truck, a member movablelongitudinally in said guide, means including a spring on said bolsterfor resisting longitudinal movement of said member, and means engagingsaid center plate and said member for centering said center plate onsaid bolster.

3. A truck for a locomotive or car comprising a bolster having a guideextending longitudinally of the truck, a center plate carried by saidbolster and movable laterally of the truck, a member movablelongitudinally in said guide, a spring carried by said bolster forresisting longitudinal movement of said member, means including a plateextending over said spring for preventing vertical displacement of saidspring, and means including said member for centering said center plateon said bolster.

4. A truck for a locomotive or car comprising a bolster, a center platecarried by said bolster, and movable laterally of said truck, a membermovable longitudinally of said bolster, means including a spring forresisting longitudinal movement of said member, means including a guidein said bolster and extending longitudinally of the truck for guidingsaid member and for preventing vertical displacement of said spring, andmeans including said member for centering said center plate on saidbolster.

5. A truck for a locomotive or car comprising a bolster, a center platecarried by said bolster and movable laterally of the truck, a membermovable longitudinally of said truck, means including a pocket formedintegral with said bolster for guiding the longitudinal movement of saidmember, means including a spring extending Within said pocket forresisting longitudinal movement of said member, and means including saidmember for centering said center plate on said bolster.

6. A truck for a locomotive or car comprising a bolster, a center platecarried by said bolster and movable laterally of said truck, a membermovable longitudinally of said truck, means including a pocket formedintegral with said bolster for guiding the longitudinal movement of saidmember, means including a spring extending within said pocket forresisting longitudinal movement of said member, and means engaging saidmember for centering said center plate on said bolster.

7. A truck for a locomotive or car comprising a bolster, a center platecarried by said bolster and movable laterally of said truck, a pocket onsaid bolster having a stop at one end, a member slidable longitudinallyof said truck in said pocket, a spring within said pocket bearingagainst said stop and said member, and means including said member forcentering said center plate on said bolster.

8. A truck for a locomotive or car comprising a bolster, a center platecarried by said bolster and movable laterally of said truck, a pocket onsaid bolster having a stop at one end, a member slidable longitudinallyof said truck in said pocket, a spring within said pocket bearingagainst said stop and said member, and means engaging said member forcentering said center plate on said bolster.

9. A truck having a locomotive or car comprising a bolster havingvertically-spaced plates, a center plate carried by said bolster andmovable laterally of said truck, a member slidable longitudinally ofsaid truck between said plates and guided thereby, a spring retainedbetween said plates for resisting longitudinal movement of said member,and means including said member for centering said center plate on saidbolster.

l0. A truck for a locomotive or car comprising a bolster havingvertically-spaced plates, a centei` plate having an inclined surfacethereon carried by said bolster and movable laterally of said truck, amember slidable longitudinally of said truck between said plates andguided thereby, a spring retained between said plates for resistinglongitudinal movement of said member, and means engaging said member andsaid inclined surface for centering said center plate on said bolster.

11. A truck having a locomotive or car comprising a bolster havingvertically-spaced plates with guides extending longitudinally of saidtruck therein, a center plate carried by said bolster and movablelaterally of said truck, a member slidable longitudinally of said truckbetween said plates and in said guides, a transverse spring retainedbetween said plates having a band eX- tending in said guides forresisting longitudinal movement of said member, and means including saidmember for centering said center plate on said bolster.

12. A truck for a locomotive or car comprising a bolster, a center platecarried by said bolster and movable laterally of said truck, a stop onsaid 15 bolster having a recess therein facing said center plate, amember slidable longitudinally of said truck, means on said bolster forguiding the longitudinal movement of said member, a coil spring havingone end held within said recess 20 and the other end bearing againstsaid center plate, and means including said member for centering saidcenter plate on said bolster.

